my level converter sits in a nice iwhack style transparent blue box with a
green power LED and running of a 9V battery the only things I wish I had
done are put a multi pole switch in so i could select between normal and
loopback mode (nothing like making sute the computer is working and the max
232) and putting monitoring lights on the data lines (presumablly the 5v
serial in side) and perhaps provision for external power. as it is though i
am in the 10s of hours of run time off a single 9v battery

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of James Newton, Host
Sent: Saturday, April 17, 2004 7:56 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:]TTL to/ From rs232 for 16F628 circuit


I agree that it is best to keep the level converter separate and use it only
when needed. There are many TTL level "RS232" applications. E.g. stuff
connected to a BASIC Stamp, or another microcontroller. Why add the circuit
(and it's noise, power draw, etc...) when you don't always need it?

Just keep a TTL<>RS232 level converter handy for when it is required. Like,
Oh, I don't know THIS ONE:
http://www.piclist.com/io/serial/rcl1


---
James.


-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] On
Behalf Of Shawn Tan Ser Ngiap
Sent: 2004 Apr 15, Thu 10:58
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:]TTL to/ From rs232 for 16F628 circuit

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Friday 16 April 2004 13:05, Mark Mynsted wrote:
> I am new to this and want to be able to connect my circuit to my pc to
> provide nice informaiton for debugging etc.  The 16F628 has a AUSART
> but I need to alter the voltage.
> I found the following here at piclist:
> http://www.piclist.com/techref/io/serial/ttl-rs232.htm

- -- >8 --

Why go through all the trouble and all the unknowns.. just pop in a MAX232
or similar chip, a couple of caps.. and you're off.. in fact, if you're
doing this regularly, you might even consider making a RS232 to TTL level
converter using a MAX232.. Just my 2 cents...

- --
========================= engineering elegance ========================
AESTE WORKS (M) SDN BHD
url:    www.aeste.net
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)

iD8DBQFAf3XQ9KUEj/m6O5oRAlIbAJ9hBTk9/6WS3B05F0gy80AlBj1AeQCeLrl/
8VHkEUvxBNXxhvv8StxFR2k=
=M2ee
-----END PGP SIGNATURE-----

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads